Babylock Serger Machine 4-thread Automatic Tension Jet Air Through This Serger machine is a Japanese version. machine, it itself is same as an American edition. But it's a Japanese edition, so "printout in the surface of the Serger machine" and "Instructions manual" are Japanese. With just one push of a button, ExtraordinAir takes your thread through all three loopers at once, instantly, with a gust of air. Plus, you can thread the in any order. ExtraordinAir Threading: Eliminate tensions and puckering with the patented Automatic Thread Delivery System. Differential Feed Easily, "development stitch" and "contracted stitch" can be done only by operation of a lever. The elastic material is built into the beautiful silhouette. The collected movement and the rib bill are also easy, and there is other how to use variously a hem of Sodeyama's including Ise and skirt.